Datasheet

ADT7316/ADT7317/ADT7318
Rev. B | Page 3 of 44
SPECIFICATIONS
Temperature ranges for A version: –40°C to +120°C. V
DD
= 2.7 V to 5.5 V, GND = 0 V, REFIN = 2.25 V, unless otherwise noted.
Table 1.
Parameter
1
Min Typ Max Unit Conditions/Comments
DAC DC PERFORMANCE
2, 3
ADT7318
Resolution 8 Bits
Relative Accuracy ±0.15 ±1 LSB
Differential Nonlinearity ±0.02 ±0.25 LSB Guaranteed monotonic over all codes.
ADT7317
Resolution 10 Bits
Relative Accuracy ±0.5 ±4 LSB
Differential Nonlinearity ±0.05 ±0.5 LSB Guaranteed monotonic over all codes.
ADT7316
Resolution 12 Bits
Relative Accuracy ±2 ±16 LSB
Differential Nonlinearity ±0.02 ±0.9 LSB Guaranteed monotonic over all codes.
Offset Error ±0.4 ±2 % of FSR
Gain Error ±0.4 ±2 % of FSR
Lower Dead Band 20 65 mV Lower dead band exists only if offset error is
negative. See
Figure 2.
Upper Dead Band 60 100 mV Upper dead band exists if V
REF
= V
DD
and offset
plus gain error is positive. See
Figure 3.
Offset Error Drift
−12
ppm of FSR/°C
Gain Error Drift
−5
ppm of FSR/°C
DC Power Supply Rejection Ratio
−60
dB
∆V
DD
= ±10%.
DC Crosstalk 200 μV
See
Figure 6.
THERMAL CHARACTERISTICS
INTERNAL TEMPERATURE SENSOR
Internal reference used. Averaging on.
Accuracy at V
DD
= 3.3 V ±10% ±1.5 °C T
A
= 85°C.
±0.5 ±3 °C T
A
= 0°C to +85°C.
±2 ±5 °C
T
A
= −40°C to +120°C.
Accuracy at V
DD
= 5 V ±5% ±2 ±3 °C T
A
= 0°C to +85°C.
±3 ±5 °C
T
A
= −40°C to +120°C.
Resolution 10 Bits Equivalent to 0.25°C.
Long-Term Drift 0.25 °C Drift over 10 years if part is operated at 55°C.
EXTERNAL TEMPERATURE SENSOR External transistor = 2N3906.
Accuracy at V
DD
= 3.3 V ±10% ±1.5 °C T
A
= +85°C.
±3 °C T
A
= 0°C to +85°C.
±5 °C
T
A
= −40°C to +120°C.
Accuracy at V
DD
= 5 V ±5% ±2 ±3 °C T
A
= 0°C to +85°C.
±3 ±5 °C
T
A
= −40°C to +120°C.
Resolution 10 Bits Equivalent to +0.25°C.
Output Source Current 180 μA High level.
11 μA Low level.
Thermal Voltage Output
8-Bit DAC Output
Resolution 1 °C
Scale Factor 8.79 mV/°C
0 V to V
REF
output. T
A
= −40°C to +120°C.
17.58 mV/°C
0 V to 2 V
REF
output. T
A
= −40°C to +120°C.
10-Bit DAC Output
Resolution 0.25 °C
Scale Factor 2.2 mV/°C
0 V to V
REF
output. T
A
= −40°C to +120°C.
4.39 mV/°C
0 V to 2 V
REF
output. T
A
= −40°C to +120°C.